Electrode.



0. SGHUNHERR & J. HESSBERGER.

ELECTRODE.

APPLICATION FILED 1530.28, 1908.

1,038,208. v v Pate ted Sept. 10,1912.

r zavw itior UNITED STATES ATENT OFFICE.

OTTO SCHfiNHEBR AND J'UHANNES HESSBER GER, 01's FISK AA, NORWAY, ASSIGNORS, BY i .MESNE ASSIGNMENTS, TO'NORSK HYDRO-ELEKTRISK KVAELSTOFAKTIESELSKAB,-

' OI "CHBISTIANIA, NORWAY.

ELEc'rRohn.

Specification 0 Letters Patent.

Patented Sept. 10, 1912.

Original application filed March 16, 1906, Serial No. 306,410. Dtvidediand this application filed December doctor of philosophy and chemist, and J o- HANNEB Hnssnnncnn, electrician, subjectsl, respectively, of the King of Saxony and the King of Prussia, residing atFiskaa; Norway, have invented new and useful Improvements in Electrodes, which is-an invention divided out of our application for Letters Patent filed March 16, 1906, Serial No. 306,410, and of which the following is a specification. I

In Patent No. 930,238, dated August 3, 1909, of which the present application is a division, .we 'have described the production of a new electrical phenomenon, namely long stable electric arcs. In the apparatus for the production of the said long stable electric arcs we use a new electrode which We have invented and which is the subject matterof the present application. The said long stable electric arcs are principally used for effecting reactions in gases and are gen erated in afurnace whichlis preferably tubular and through which a current of the said gases is suitably passed. Our new electrode is so arranged that,upon the one hand it can be coole by the aid of aportion of the current of gas to be treated and'on the other hand is provided with a central rod which while wearing away itself when the apparatus is at work prevents the remainder of the electrode from ,suffering to any extent and which can be adjusted by being pushed forward whenever necessary.

In the accompanying drawings, Figure 1 re resents, in vertical section, a convenient form of our new electrode, which is rcpre-' sented in position in a short piece ot'tube. Fig. 2 represents, in; vertical section, another convenieutforni of our electrode.

Referring to Fig. l, the electrode represented imposition in a short piece of tube AB which by means of its upper flange can be attached to the tube or furnace in which the long arc is formed. The said electrode is insulated from the tube or l'urnacc Ali by means of insulating material El). The electrode is made up of three parts: the hollow tube C, the head C and the movable central rod C The lower part of the tube AB constitutes an annular chamber surrounding the electrode. A part of the gas to be treated is forced into this chamber and 2a, 1908. Serial No. 469,588.

thence it enters the tube of the electrode throughopenings F and passes along the sald tube in the annular space surrounding the adjustable rod to the hollow head from Which it issues through the opening F as shown by the arrows.

A more efficient cooling can be eifected by the use of Water in the electrode instead of a' shown in Fig. 2. C is a tube, C represents the head, and C the adjustable 1ron rod. ater is circulated through the tubeC, entering at G and leaving at H, and taking the course indicated by the. arrows. The water should be supplied through long india-rubl'i'er tubes and should be as pure as possible so as to prevent large quantities of the current going directly to earth through the water. E represents insulating material;

Now what we claim is z 1. An electrode comprising a hollow tube leading to a hollow 'head through which runs a central adjustable rod movable relatively to the remaining parts of the electrode the said tube and head containing openings for the circulation ofcooling fluid.

2. An electrode comprising a rod of con ducting material in a hollow holder, movablerelatively to this holder, and means for cooling the said adjusting rod and holder.

In conjunction with an electric furnace for gas-reactions an electrode insulated from the furnace, a chamber at the end of said'furnacc not in communication. with it, means for forcing a cooling fluid into the said chamber, openings from said chamber into the hollow tubular stem of the electrode, an annular spacc'within the said stein surrounding a rod of conducting material and loading to the hollow head of the said electrode, and means for withdrawing the said cooling fluid from the electrode after it has become heated.

4. In conjunction with an electric furnace for gas reactions an elect rode insulated from the furnace, a chamber at the "ml of said furnace, means for forcing gas into said chan'lbcr, openings from said chamber into the hollow tubnlar stem of the electrode, an set our hands in the presenceof two subannular space within said tubuiar stem surscrlbing wltnesses.

rounding an adjustable rod of conducting OTTO SCHGNHERR. I material and leadin to the hollow hea JOHANNES HESSBERGER. 5 of the electrode an openings from said 'Witnesses':

' hollow head to the body of the furnace. A. W. ABEL,

In testimony whereof We have hereunto JAG. HYvALL. 

